V-minion - Bed heater sometimes not working; move bed a bit and it works again (sometimes)
I got the full kit a while ago and have put 430hrs of printing on this thing. I now get 'Heater heater_bed not heating at expected rate'. Observations:
- heater bed is at 100% but the bed doesn't get warm and finally it stops with the error above
- when I wiggle the heater cables a bit while it's still at 100% sometimes heating starts and then the print finishes successfully
- during the print, the bed heater goes to 100% for a short period from time to time, as if the bed cools down due to bad connection. Usually bed heat is around 30% percent.
It seems to be the bed heater has a loose connection. Any advise?
9 Replies
other-emerald•2y ago
You probaply have a cable break in the Heater Cable at some hard edge.
other-emerald•2y ago
other-emerald•2y ago
on mine it got so hot that the sleeve melted into the Cable tie Holder
other-emerald•2y ago
other-emerald•2y ago
now it has bed Wagos and Heluflon Cable
sunny-greenOP•2y ago
Thanks, looks like a great solution. So for you it broke where the cables are attached to the bed sled? Seems like the most likely place. Could you share what exact cable you used? Is the bed wago holder available somewhere?
other-emerald•2y ago
Printables.com
V-minion_wago_221_mount by Squirrelbrain | Download free STL model ...
Wago 221 holder with ADXL mounting holes to fit RatRig V-Minion | Download free 3D printable STL models
other-emerald•2y ago
the Cables are 1mm² and 0.25mm² Heluflon Cables
sunny-greenOP•2y ago
Update: I managed to (temporarily?) fix the issue by cutting the part of the cable that had a loose connection. I cut the cable around where it's attached to the bed and could pull out some strands of wire. The length of the strands told me where the loose connection should be so I cut that out and connected it again using the wago mod above. This got me printing again and so far I didn't have any errors due to bed heating, but I'm seeing again the pattern of bed heat spiking to 100% (see screenshot). Is this normal?
